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crypto: ccp - Fix possible deadlock in SEV init failure path

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__sev_platform_init_handle_init_ex_path() calls
rmp_mark_pages_firmware() with locked=false while the parent
function of init_ex_path already acquired the sev_cmd_mutex.
In the case of an RMPUPDATE failure for any page after the first, the cleanup
path would invoke reclaim pages which would result in a deadlock in
sev_do_cmd.

Pass locked=true to honor the lock status of the parent function.

Fixes: 7364a6fbca ("crypto: ccp: Handle non-volatile INIT_EX data when SNP is enabled")

Reported-by: Chris Mason <clm@meta.com>
Assisted-by: Claude:claude-opus-4-6
Fixes: 7364a6fbca ("crypto: ccp: Handle non-volatile INIT_EX data when SNP is enabled")
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Atish Patra <atishp@meta.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Atish Patra 2026-06-02 15:36:34 -07:00 committed by Herbert Xu
parent e264401ce4
commit b0e7ec0dab
1 changed files with 1 additions and 1 deletions
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2
drivers/crypto/ccp/sev-dev.c
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@ -1719,7 +1719,7 @@ static int __sev_platform_init_handle_init_ex_path(struct sev_device *sev)
unsigned long npages;
npages = 1UL << get_order(NV_LENGTH);
if (rmp_mark_pages_firmware(__pa(sev_init_ex_buffer), npages, false)) {
if (rmp_mark_pages_firmware(__pa(sev_init_ex_buffer), npages, true)) {
dev_err(sev->dev, "SEV: INIT_EX NV memory page state change failed.\n");
return -ENOMEM;
}